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Finding the Fourth Proportional to 326,990, 489,773.01 and 158,154.21

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Solution

The fourth proportional to 326,990, 489,773.01 and 158,154.21 is: 236,886.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,990 : 489,773.01 = 158,154.21 : x
  2. Step 2: Convert to fraction form
    326,990/489,773.01 = 158,154.21/x
  3. Step 3: Cross multiply
    326,990x = 489,773.01 × 158,154.21
  4. Step 4: Simplify right side
    326,990x = 77,459,663,475.87
  5. Step 5: Solve for x
    x = 77,459,663,475.87/326,990
  6. Step 6: Final answer
    x = 236,886.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.